Mortimer, the Spire's Steward

When Mortimer, the Spire's Steward enters the battlefield, you may search your library for an
artifact card with converted mana cost 2 or less and
put it into your hand. If you do, shuffle your
library.
Whenever a creature dies, you may pay {b}. If you
do, you gain 1 life.
In life, he served faithfully. In death, he serves eternally.